## Old preprints

The preprints which were already published on journals.

Find the latest version of the following papers in journals. →
Go to publication lists in the top page.
- T. Ishiwata and T. Ohtsuka,
Numerical analysis comparing ODE approach and level set method for evolving spirals
by crystalline eikonal-curvature flow,
*Hokkaido University Preprint Series in Mathematics* #1121 or arXiv:1901.09259(2019).
- Y. Giga, H. Mitake, T. Ohtsuka, and H. V. Tran,
Existence of asymptotic speed of solutions to birth and spread type
nonlinear partial differential equations,
*Hokkaido University Preprint Series in Mathematics* #1113 or arXiv:1808.06312(2018).
- T. Ishiwata and T. Ohtsuka,
Evolution of spiral-shaped polygonal curve by crystalline curvature flow
with a pinned tip,
Hokkaido University Preprint Series in Mathematics #1097(2016).
- T. Ohtsuka, Y.-H. R. Tsai, and Y. Giga,
Growth rate of crystal surfaces with several dislocation centers,
arXiv:1612.08924(2016).
(web page)
- T. Ohtsuka, Discontinuous stationary solution to generalized
eikonal-curvature equation and its stability,
Hokkaido University Preprint Series in Mathematics #1059(2014).
(web page)
- T. Ohtsuka, Y.-H. R. Tsai and Y. Giga,
A level set approac reflecting sheet structure
with single auxiliary function for evolving spirals
on crystal surface,
Hokkaido University Preprint Series in Mathematics #1025(2012).
(web page)
- M.-H. Giga, Y. Giga, T. Ohtsuka, N. Umeda,
On behavior of signs for the heat equation and a diffusion method
for data separation,
Hokkaido University Preprint Series in Mathematics #998(2012).
(web page)
- T. Ohtsuka, K. Shirakawa, and N. Yamazaki,
Optimal control of a singular diffusion equation with constraint,
Hokkaido University Preprint Series in Mathematics #875(2007).
(web page)
- S. Goto, M. Nakagawa, and T. Ohtsuka,
Uniqueness and existence of generalized motion for spiral crystal growth,
Hokkaido University Preprint Series in Mathematics #872(2007).
(web page)
- Y. Giga, T. Ohtsuka and R. Schaetzle,
On a uniform approximation of motion by anisotropic curvature
by the Allen-Cahn equations,
Hokkaido University Preprint Series in Mathematics #738(2005).
(web page)
- T. Ohtsuka,
A level set method for spiral crystal growth,
Hokkaido University Preprint Series in Mathematics #551(2002).
(web page)